package tedu.api.io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("hsq.jpeg");
        FileOutputStream fos = new FileOutputStream("hsq_cp2.jpeg");

        long start = System.currentTimeMillis();
        byte[] data = new byte[1027*10];
        int len;
        while((len=fis.read(data))!=-1){
            //将字节数组byte从下标0开始连续len个字节写出(做到赌多少就写多少)
            fos.write(data,0,len);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕!耗时："+(end-start)+"ms");




        /*long start = System.currentTimeMillis();
        byte[] data = new byte[1027*10];
        while(fis.read(data)!=-1){
            fos.write(data);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕!耗时："+(end-start)+"ms");*/

        fis.close();
        fos.close();


    }
}
